Port 546 — DHCPv6 client
Quick reference for TCP/UDP port 546, used by DHCPv6 client. Includes what the service does, security guidance and related ports.
Port
546
Protocol
UDP
Service
DHCPv6 client
What is port 546?
DHCPv6 client.
What port does DHCPv6 client use?
DHCPv6 client listens on port 546 by default.
Security guidance
Medium risk — open with care
Port 546 (DHCPv6 client) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Related ports
Frequently asked
What is port 546 used for?+
Port 546 is the standard TCP/UDP port for DHCPv6 client. DHCPv6 client.
What port does DHCPv6 client use?+
DHCPv6 client listens on port 546 by default.
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